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Analog Devices Inc./Maxim Integrated MAX1143ACAP
- Part No.:
- MAX1143ACAP
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX1143ACAP.pdf
- Description:
- 14-BIT ADC, 200KSPS
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
MAX1143ACAP from Maxim Integrated is a 14-bit, 200ksps successive-approximation analog-to-digital converter (ADC) with integrated +4.096V reference, input scaling network, track/hold, and three user-programmable digital outputs. It operates from a single +4.75V to +5.25V supply, supports ±4.096V bipolar or 0–+4.096V unipolar input ranges, and delivers ≥81dB SINAD at 5kHz. It is designed for precision data acquisition in medical instruments and industrial I/O modules.
For engineers reviewing the MAX1143ACAP datasheet, MAX1143ACAP pinout, MAX1143ACAP application, or MAX1143ACAP equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply support for volume OEM deployment.
Technical Context
The MAX1143ACAP uses a successive-approximation register (SAR) architecture with internal track/hold and software-configurable unipolar/bipolar input scaling. Its input scaler maps ±4.096V or 0–+4.096V external signals to the internal DAC range while operating from a single +5V supply.
It supports three clock modes: internal clock (freeing host MCU timing burden), external clock (24- or 32-cycle modes), and on-demand calibration via Control-Byte (M1=0, M0=1). Calibration corrects offset, gain, INL, and DNL errors, with SSTRB signaling start/end status in both clock modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 14 bits - guarantees no missing codes across full scale, enabling high-fidelity signal reconstruction in instrumentation. |
| Sampling Rate | 200 ksps (bipolar), 150 ksps (unipolar) - supports real-time monitoring of fast transients in industrial process control loops. |
| SINAD | ≥81 dB (min, 5 kHz input) - ensures >13.2 effective bits of dynamic resolution for low-noise sensor interfacing. |
| Input Range | ±4.096 V or 0 to +4.096 V - matches standard reference voltage rails, eliminating need for external level-shifting in 4–20 mA loop receivers. |
| Supply Current | 7.5 mA (unipolar), 5.9 mA (bipolar) - enables battery-powered portable medical devices with >10-hour runtime on 200 mAh cells. |
| Shutdown Current | 2.5 µA - allows deep-sleep operation between measurement cycles in energy-constrained IoT edge nodes. |
| INL | ±1 LSB (max) - guarantees monotonicity and <0.006% full-scale linearity error for closed-loop feedback accuracy. |
Pinout & Package
MAX1143ACAP is housed in a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, footprint-compatible with industry-standard 20-SSOP PCB layouts and reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AIN | Analog Input | Accepts ±4.096V (bipolar) or 0–+4.096V (unipolar); includes ±16.5V fault protection active even during power-down. |
| REF | Reference Buffer Output / ADC Reference Input | Provides stable +4.096V nominal output (±40 ppm/°C tempco); bypassed with 2.2µF to AGND for low-noise conversion. |
| REFADJ | Bandgap Reference Output / Buffer Input | Used to fine-tune REF voltage ±100 mV; tied to AVDD to disable internal reference when using external VREF. |
| SHDN | Shutdown Control Input | Active-low signal reducing total supply current to 2.5 µA; retains register state and requires no reinitialization on wake-up. |
| P0–P2 | User-Programmable Digital Outputs | CMOS push-pull outputs controlled by Control-Byte bits 0–2; directly drive 8-channel MUX or PGA without external logic. |
| SSTRB | Serial Strobe Output | Signals conversion start/end: goes low at start and high at completion in internal clock mode; pulses high for one SCLK cycle in external mode. |
| DOUT/DIN/SCLK/CS | SPI/QSPI/MICROWIRE-Compatible Serial Interface | Full-duplex 3-wire interface (DIN/DOUT/SCLK) with chip select; supports up to 8 MHz data transfer and direct TMS320 DSP connection. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated +4.096V reference with ±20 ppm/°C tempco | Eliminates external reference IC and associated layout complexity while maintaining <0.1% full-scale drift over 0°C to +70°C. |
| Software-selectable unipolar/bipolar input mode | Enables single hardware design to support both 4–20 mA (unipolar) and ±10 V (bipolar) industrial sensor inputs via Control-Byte bit 6. |
| On-demand calibration for offset, gain, INL, and DNL | Corrects system-level drift after temperature shifts >10°C or supply changes >100 mV, restoring guaranteed ±1 LSB INL performance. |
| Three user-programmable CMOS outputs (P0–P2) | Directly controls external 8:1 analog multiplexer or programmable gain amplifier-no GPIO expansion required on host microcontroller. |
| Internal or external clock selection | Internal clock relieves host MCU timing constraints; external clock enables deterministic, synchronized sampling across multiple ADCs. |
Applications
| Industrial Process Control | Medical Instrumentation |
|---|---|
|
Use Scenario: Monitoring thermocouple and RTD signals in PLC analog input modules with 4–20 mA loop integration. IC Role / Device Role / Timing Role: Precision ADC front-end converting conditioned sensor outputs to digital values for real-time PID control execution. Use Value: ±1 LSB INL and 81 dB SINAD ensure sub-0.1% measurement accuracy across 0–100°C temperature spans in factory automation systems. |
Use Scenario: Digitizing ECG, EEG, and blood pressure waveforms in portable patient monitors. IC Role / Device Role / Timing Role: High-resolution, low-power ADC capturing bio-signals at 200 ksps with minimal noise injection into sensitive analog front-ends. Use Value: 2.5 µA shutdown current and single +5V supply enable multi-day battery life in handheld diagnostics without compromising signal fidelity. |
| Industrial I/O Modules | Data-Acquisition Systems |
|
Use Scenario: Modular analog input cards supporting mixed-voltage field sensors (±10 V, 0–5 V, 4–20 mA) in distributed control systems. IC Role / Device Role / Timing Role: Configurable ADC with software-selectable input range and programmable outputs driving channel-selection logic. Use Value: P0–P2 outputs eliminate discrete logic gates, reducing BOM count and board area while enabling 8-channel multiplexing per device. |
Use Scenario: High-channel-count benchtop DAQ systems requiring synchronized sampling across multiple channels. IC Role / Device Role / Timing Role: SPI-compatible ADC with SSTRB strobe enabling precise inter-device timing alignment in multi-ADC configurations. Use Value: External clock mode with 24-cycle conversion and SSTRB pulse allows deterministic sample alignment within ±10 ns jitter across 16+ channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 14-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS8325IPW | 16-bit resolution, 100 ksps max, external reference only, no integrated scaler or programmable outputs. | Higher resolution but lower speed and no built-in input conditioning; requires external op-amps and reference for ±4.096V inputs. | Select when absolute precision >14 bits is required and system can accommodate external signal conditioning. |
| AD7940BRMZ | 14-bit, 100 ksps, internal reference (4.096 V), SPI interface, no programmable outputs or input scaler. | Lacks P0–P2 outputs and input scaling; supports only unipolar 0–VREF input; smaller 10-lead MSOP package. | Choose for space-constrained designs where input range is fixed unipolar and MUX/PGA control is handled externally. |
Compared with MAX1143ACAP, ADS8325IPW trades speed and integration for resolution, while AD7940BRMZ reduces feature set and package size at the cost of flexibility in input configuration and peripheral control-making MAX1143ACAP optimal for compact, self-contained industrial DAQ nodes.
Availability
MAX1143ACAP is available at Aetrix Electronics and suitable for industrial process control, medical instrumentation, and data-acquisition systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX1143ACAP includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX1142/MAX1143 product line was designed for precision, low-power, single-supply data acquisition in space- and power-constrained environments-integrating reference, scaling, and control logic to minimize external components.
FAQ
What input voltage ranges does the MAX1143ACAP support?
The MAX1143ACAP supports two software-selectable input ranges: 0 to +4.096 V (unipolar) and ±4.096 V (bipolar). These ranges are configured via bit 6 of the serial Control-Byte. The internal input scaler and ±16.5 V fault protection circuitry ensure robust operation across both modes without external components. This makes MAX1143ACAP suitable for interfacing with standard industrial sensors and medical transducers.
Does the MAX1143ACAP require an external reference voltage?
No, the MAX1143ACAP includes an integrated +4.096 V bandgap reference with ±20 ppm/°C tempco and 4.056 V to 4.136 V output tolerance. The internal reference is enabled by default; to use an external reference, pull REFADJ to AVDD and apply the external voltage to the REF pin. The MAX1143ACAP reference architecture eliminates the need for external reference ICs in most applications, simplifying design and reducing BOM cost.
How does the MAX1143ACAP handle calibration?
The MAX1143ACAP features on-demand software calibration that corrects offset, gain, integral nonlinearity (INL), and differential nonlinearity (DNL) errors. Calibration is initiated by writing a Control-Byte with M1 = 0 and M0 = 1. It must be performed in the same clock mode (internal or external) used for conversions. After power-up or reset, calibration restores guaranteed ±1 LSB INL performance and compensates for temperature-induced drift or supply variations.
What are the functions of the P0, P1, and P2 pins on the MAX1143ACAP?
P0, P1, and P2 are user-programmable CMOS push-pull digital outputs controlled by bits 0–2 of the serial Control-Byte. They power up low and remain low-impedance during hardware or software shutdown. These outputs are designed to directly drive external components such as 8-channel analog multiplexers or programmable gain amplifiers-eliminating the need for additional GPIO expanders or discrete logic in the MAX1143ACAP system design.
Can the MAX1143ACAP interface directly with TMS320-family DSPs?
Yes, the MAX1143ACAP supports direct connection to TMS320-family digital signal processors via its SSTRB (serial strobe) output. In external clock mode, SSTRB pulses high for one SCLK period before the MSB decision, providing precise timing synchronization. The SPI/QSPI/MICROWIRE-compatible serial interface (DIN/DOUT/SCLK/CS) requires no level-shifting or glue logic, enabling seamless integration with TI C2000 and C5000 series DSPs in real-time control applications.
MAX1143ACAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Number of Bits:
- 14
- Sampling Rate (Per Second):
- 200k
- Number of Inputs:
- 1
- Input Type:
- Single Ended
- Data Interface:
- MICROWIRE, QSPI, SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 4.75V ~ 5.25V
- Voltage - Supply, Digital:
- 4.75V ~ 5.25V
- Features:
- PGA, True Bipolar
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 20-SSOP
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
MAX1143ACAP FAQ
1.How can I place an order for MAX1143ACAP through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1143ACAP on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX1143ACAP reliable?
The price and inventory of MAX1143ACAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1143ACAP is usually 5 days.
3.What payment methods are accepted for MAX1143ACAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1143ACAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1143ACAP?
MAX1143ACAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1143ACAP order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX1143ACAP?
For technical support, including MAX1143ACAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1143ACAP requirements.
6.How does Aetrix verify that MAX1143ACAP is sourced from the original manufacturer or authorized distributors?
All MAX1143ACAP products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX1143ACAP meets industry standards.
7.What is the process for return or replacement of MAX1143ACAP?
All MAX1143ACAP units undergo pre-shipment inspection (PSI). If there is an issue with MAX1143ACAP, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX1143ACAP part is unused and in its original packaging.
Return procedure for MAX1143ACAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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